What are the periodic properties of the elements? What are the general properties of elements? Besides carbon, what other elements can organic compounds contain? What percentage of all minerals are native elements? What elements can exist in all three states of matter?
What elements on the periodic table are nonmetals? What is the element AR classified as in the periodic table? What elements on the periodic table are gases? What type of element is calcium? What is the first element on the periodic table?
What chemical elements compose Pluto's core? What elements are in the lanthanide series? How are natural elements formed? What are two elements that are in all silicate minerals? What elements on the periodic table are gases? What elements can exist in all three states of matter?
all elements are reactiveB. oxygen only reacts with hydrogen and carbonC. it requires extraordinary energy for nuclei to mix togetherD. noble gases can only react with others at a high speed53. In Stanton's opinion, if we put all the elements into a sealed container,A. it can endanger ...
Noble gases include Helium, Neon, Argon,Krypton, Xenon and Radon. These are all found in Group 18, in the rightmostcolumn of the periodic table. If you look at the periodic table, you willnotice that these elements are the only ones, which do not have a charge.Helium has the lowest ...
The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state). The number of elements in a period increases as one traverses down the periodic table because as the energy level...
Noble gases are monatomic, they exist as single atoms. Neon is used for neon signs, helium is used in balloons, argon is used in 3D printing, welding, lasers and has lots of other manufacturing uses. Radioactive Elements Many of the elements at the bottom of the table ( in green ) are...
Read on to find out how cesium helps you every day. You'll Never Be Late Again! Do you hate to be late? What you need is a clock that uses the element cesium (pronounced SEE-zee-em) to keep time! All elements are substances that are made up of just one kind of atom. Atomic ...
was there an accurate or reliable model of atoms that could describe observed chemical behaviors. The so-called 'noble gases' (helium, neon, xenon, etc.) and many other elements were unknown. As more elements were identified, however, Mendeleev's crude periodic table was expanded and refined....
The element name can tell you something about its properties. Elements with names ending with -genare nonmetals that are gases in pure form at room temperature. Elements that have names ending with -inebelong to a group of elements called halogens. Halogens are extremely reactive and readily ...